28202649444 has 24 divisors (see below), whose sum is σ = 73117980320. Its totient is φ = 9400883112.

The previous prime is 28202649401. The next prime is 28202649491. The reversal of 28202649444 is 44494620282.

It is a super-2 number, since 2×28202649444² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28202649444.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130567714 + ... + 130567929.

Almost surely, 2^28202649444 is an apocalyptic number.

It is an amenable number.

28202649444 is an abundant number, since it is smaller than the sum of its proper divisors (44915330876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28202649444 is a wasteful number, since it uses less digits than its factorization.

28202649444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261135656 (or 261135648 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 28202649444 in words is "twenty-eight billion, two hundred two million, six hundred forty-nine thousand, four hundred forty-four".